Characters played by Peter Lorre
Doctor Gogol
Characters played by Frances Drake
Yvonne Orlac
Characters played by Colin Clive
Stephen Orlac
Characters played by Ted Healy
Reagan
Characters played by Sara Haden
Marie
Characters played by Edward Brophy
Rollo
Characters played by Henry Kolker
Prefect Rosset
Characters played by Keye Luke
Dr. Wong
Characters played by May Beatty
Françoise
Characters played by George Davis
Chauffeur (scenes deleted)
Characters played by Billy Dooley
Undetermined Role (scenes deleted)
Characters played by Harold Huber
Thief (scenes deleted)
Characters played by Isabel Jewell
Marianne (scenes deleted)
Characters played by Leo White
Undetermined Role (scenes deleted)